Online casinos have their own rules for the legal gambling age. But, legally, there are only certain jurisdictions that allow 18-year-olds to risk real money gambling. Gambling is often a rite of passage for young gamblers after they turn 18. Rules will vary between countries, states, and territories throughout the world. Can you gamble at 18? If so, where can you gamble at 18? These questions are largely dependent on which jurisdiction you are located in.